Reuters journalist Matt Siegel inputs his passcode onto his Apple Watch as his tattoos prevent the device's sensors from correctly detecting his skin, in Sydney, Australia, April 30, 2015. Early adopters of the Apple Watch, Apple Inc's first new product in five years, are complaining that a number of its key functions are disrupted by their tattoos. Owners of Apple Watch - including Siegel, who bought a 42mm version with stainless steel case and black classic buckle for A$1,029 (534 pounds) - have found that their inked skin confuses the sensors on the underside of the device.    REUTERS/Jason Reed
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